Since I'm new to the forum and asked for help in a previous post maybe I can offer some info that may be of help to someone, although I'm sure most of you are already aware of this. When I bought my Schecter Stilletto Elite V five string bass I decided to get a small practice amp to supplement my big amp. I checked around, took my bass along and found that the new release Marshall MB30, thirty watt ss bass amp works great with a five string. I tried about five other practice amp in the same wattage category and "all" of them cracked and popped when trying to produce the sound of the B string, the very low frequency string. I think it is the amplifier section, not the speaker, because one of the amps was an SWR LA 10 which probably is a fairly decent practice amp. It cracked an popped as bad as the Peavey's. The Marshall MB30, no affilliation, held the sound without distorting, but it's not regular type distortion you hear, it's a crackling and popping sound that sounds very destructive. So, if I was someone considering a five string bass, I would bring my amp in with me and see if it can handle the B string wthout crackling and popping. I don't think that a lot of the amp sections are set up for the low frequency of that B string. I'm an amateur, so this is just hands on experience talking and my idea that it's the amp and not the speaker could be wrong; but I would think the speaker would not be the determining factor, especially at low volume. I would think the speaker would have enough variance designed into it to handle the B string. This is why I think the amp sections are the source of the problem. The amp sections may be designed to handle specific frequency ranges and when the input signal is outside of that discrete range they are not prepared to handle it. Again this is conjecture. Some of you pro's surely know what is going on. But a word to the wise: if you are getting a five string take your amp and make sure it doesn't break up real ugly when you hammer that B string even moderately softly, not to mention really hammering it at any volume. Hope this observation based upon my personal experience is of some value and not way off the mark. Glad to join the group, Duffy More to contribute later, if you all are interested.